> the plane was flying funny because one of the aileron was replaced with electrical tape from dollar store by international airline technician
This is wild speculation, based on second-hand information from your friend, who, given that they referred to it as electrical tape when anyone in the industry would know it's called speed tape and has no similarities with electrical tape, probably doesn't actually know which part of the aircraft is the aileron.
Speed tape on the wing is quite common anywhere in the world on any carrier, and is safe if done properly.
Lion Air and Indonesian aviation has a lot of problems in general, but I doubt this issue was genuinely a safety issue. Your friend probably felt some turbulence on landing.
While I don’t know the specifics here, many people mistake tape on airplanes for normal tape, when it is usually aluminum speed tape[0] that is (in the right scenario) safe to use on airplanes.
the plane acting funny on landing in jakarta, sort of jumping around, weird turbulence
when it land, he look outside and see that one of the major aileron has fuselage completely missing and had been replace with electrical tape
the plane was flying funny because one of the aileron was replaced with electrical tape from dollar store by international airline technician
importantly, if this plane crash, nobody will ever admit this, cctv record deleted, etc. they will just blame beooing